US9225186B2 - Method and device for controlling charge of battery - Google Patents

Method and device for controlling charge of battery Download PDF

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Publication number
US9225186B2
US9225186B2 US13/979,379 US201113979379A US9225186B2 US 9225186 B2 US9225186 B2 US 9225186B2 US 201113979379 A US201113979379 A US 201113979379A US 9225186 B2 US9225186 B2 US 9225186B2
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Prior art keywords
charge current
battery
current coefficient
preset
calculated result
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US20130285619A1 (en
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Lingqiao Teng
Mingming Liu
Yanni Meng
Baohang Zhou
Shuwang Wei
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ZTE Corp
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ZTE Corp
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    • H02J7/0052—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the disclosure relates to the field of electrics, and in particular to a method and device for controlling charge of a battery.
  • time slot t 0 -t 1 a main power supply system supplies power normally, and the battery is in a floating charge state with a very small charge current for maintaining a constant power source only;
  • time slot t 1 -t 2 the main power supply system stops supplying power, and the battery discharges to supply electric energy required by a load;
  • time slot t 2 -t 3 the main power supply system restores power supply, supplies electric energy required by the load, and charges the battery at the same time; and the battery is in a constant current charge phase which is a key phase in the battery charge management;
  • time slot t 3 -t 4 with gradual restoration of the battery capacity, the charge current of the battery decreases gradually while the battery voltage increases continuously; and the battery enters a constant voltage charge phase when the battery voltage reaches a preset target voltage value;
  • time slot t 4 -t 5 the battery is close to the full capacity, the charge current decreases to zero gradually, and the battery enters a maintenance charge phase which is also known as an absorption phase;
  • a small capability generator is generally used for power generation in an emergency power supply solution applied by a communication base station in a remote area. If a battery is charged and a load is powered still according to a power supply current of an alternating current grid when the generator is started, the generator may be started frequently due to insufficient load capacity, thereby influencing the service life of the battery.
  • a battery may discharge deeply when an alternating current commercial power fails frequently. The battery may be never fully charged if not charged by a large current rapidly, and the service life of the battery will be seriously influenced as time passes. At the same time, the battery capacity of a battery which has been used for a long period of time will decrease gradually, and the battery may be overcharged if the charging current of the battery is not reduced properly.
  • the disclosure provides a method and device for charging a battery, to enable adaptive charge management according to application scenarios and improve the environmental adaptability of battery charging to further extend the service life of the battery and save costs.
  • a method for controlling charge of a battery includes:
  • the method may further include: before charging the battery,
  • the presetting the static factors based on the battery and a power supply system for the battery may include:
  • the monitoring a temperature of the battery in real time and acquiring a corresponding dynamic factor according to the temperature of the battery may include:
  • the calculating a maximum allowed charge current according to the dynamic factor and preset static factors may include:
  • the calculating a sum of the dynamic factor and the preset static factors and acquiring the charge current coefficient according to the calculated result may include:
  • the disclosure provides a device for controlling charge of a battery, which includes: a first processing unit, a second processing unit and a third processing unit, wherein
  • the first processing unit is configured to, when charging a battery, monitor a temperature of the battery in real time, and to acquire a corresponding dynamic factor according to the temperature of the battery, wherein the dynamic factor is used for characterizing a dynamically regulating component of a charge current coefficient during the charge process;
  • the second processing unit is configured to calculate a maximum allowed charge current according to the dynamic factor and preset static factors, wherein the static factors are used for characterizing fixed components of the charge current coefficient during the charge process;
  • the third processing unit is configured to control the charge of the battery according to the maximum allowed charge current.
  • the first processing unit may be configured to, before charging the battery, preset the static factors based on the battery and a power supply system for the battery.
  • the first processing unit may be specifically configured to monitor the temperature of the battery in real time, and acquire a current battery temperature; to calculate a difference between a preset battery reference temperature and the current battery temperature, and multiply the difference by a preset coefficient to obtain the dynamic factor.
  • the second processing unit may be specifically configured to calculate a sum of the dynamic factor and the preset static factors, and acquire the charge current coefficient according to the calculated result; to calculate a product of the charge current coefficient and a battery nominal capacity, and use the calculated result as the maximum allowed charge current.
  • the second processing unit may be specifically configured to determine whether the calculated result is greater than or equal to a preset charge current coefficient minimum value, and smaller than or equal to a preset charge current coefficient maximum value; if yes, to use the calculated result as the charge current coefficient; otherwise, when determining that the calculated result is smaller than the preset charge current coefficient minimum value, to use the preset charge current coefficient minimum value as the charge current coefficient; and when determining is that the calculated result is greater than the preset charge current coefficient maximum value, to use the preset charge current coefficient maximum value as the charge current coefficient.
  • the temperature of the battery is monitored in real time, and a corresponding dynamic factor is acquired according to the temperature of the battery.
  • a maximum allowed charge current is calculated by combining the dynamic factor and each preset static factor so as to regulate the maximum allowed charge current dynamically according to environmental changes, and control the charge of the battery according to the maximum allowed charge current. Therefore, this enables adaptive charge management according to application scenarios, which effectively avoids the situation where the charge current of the battery is too high or too low, improves the environmental adaptability of battery charging, and further extends the service life of the battery and saves costs.
  • FIG. 1 is a schematic diagram illustrating existing current and voltage changes during charging a battery
  • FIG. 2 is a structural diagram of a device for controlling charge of a battery in an embodiment of the disclosure
  • FIG. 3 is a flowchart of a method for controlling charge of a battery in an embodiment of the disclosure.
  • FIG. 4 is a schematic diagram illustrating current and voltage changes during charging a battery of the disclosure
  • FIG. 5 is a flowchart of acquiring the charge current coefficient in an embodiment of the disclosure.
  • embodiments of the disclosure provide a battery charge management method and device capable of performing adaptive charge management according to application scenarios, and improving the environmental adaptability of battery charging to further extend the service life of a battery and save costs.
  • the method includes: when charging a battery, monitoring a temperature of the battery in real time, and acquiring a corresponding dynamic factor according to the temperature of the battery, wherein the dynamic factor is used for is characterizing a dynamically regulating component of a charge current coefficient during the charge process; calculating a maximum allowed charge current according to the dynamic factor and preset static factors, wherein the static factors are used for characterizing fixed components of the charge current coefficient during the charge process; and controlling the charge of the battery according to the maximum allowed charge current.
  • a device for controlling charge of a battery mainly includes the following processing units: a first processing unit 201 , a second processing unit 202 and a third processing unit 203 , wherein
  • the first processing unit 201 is configured to, when charging a battery, monitor a temperature of the battery in real time, and to acquire a corresponding dynamic factor according to the temperature of the battery, wherein the dynamic factor is used for characterizing a dynamically regulating component of a charge current coefficient during the charge process;
  • the second processing unit 202 is configured to calculate a maximum allowed charge current according to the dynamic factor and preset static factors, wherein the static factors are used for characterizing fixed components of the charge current coefficient during the charge process;
  • the third processing unit 203 is configured to control the charge of the battery according to the maximum allowed charge current.
  • a method for controlling charge of a battery in an embodiment of the disclosure includes the following detailed process:
  • Step 301 when charging a battery, monitor a temperature of the battery in real time, and acquire a corresponding dynamic factor according to the temperature of the battery, wherein the dynamic factor is used for characterizing a dynamically regulating component of a charge current coefficient during the charge process;
  • each static factor is preset based on the battery and a power supply system for the battery, and each static factor does not change during the charge process, specifically including: set a static factor Cr according to a charge coefficient marked on the battery; set a static factor Cg according to power of a power supply system backup power source; count power supply stability data of a main power supply system, and set a static factor Ck according to the power supply stability data; count and acquire a static capacity of the battery, and set a static factor Cm according to the static capacity; wherein the static factor Cr is generally the charge coefficient marked by a battery manufacturer; the static factor Cg is determined by the power of the backup power source, and may be increased within a set range when the power of the backup power source is relatively high; the static factor Ck is set according to the stability of the main power supply system, i.e., the static factor Ck is set according to the power supply stability data counted and acquired.
  • the static factor Ck is set according to a power failure frequency of the main power supply system and the duration of each power failure, i.e., the power supply stability data is acquired through counting the power failure frequency or the duration of each power failure. If the power failure frequency is high or the duration of each power failure is relatively long, the acquired power supply stability data is relatively large, which also indicates that the power supply stability of the main power supply system is poor, then Ck may be increased in the set range to accelerate the charge process; the static factor Cm reflects the battery capacity, and may be reduced within a set range when the battery capacity is relatively low in order to prevent overcharging;
  • the static factor Cg when the static factor Cg is set according to the power supply system backup power source, the static factor Cg may be set according to the power of the backup power source, e.g. when the backup power source is a generator, the static factor Cg is set according to the power of the generator; when counting the power supply stability data of the main power supply system and setting the static factor Ck according to the power supply stability data, the static factor Ck is increased automatically if it is learned through the power supply stability data counted and acquired that the power supply stability of the main power supply system is poor within a preset period of time, and the static factor Ck is reduced automatically if it is learned through the power supply stability data counted and acquired that the power supply stability of the main power supply system becomes better.
  • the static factor Ck may be increased automatically if a main power supply system alternating current grid fails frequently in a preset period of time; when counting and acquiring the static capacity of the battery and setting the static factor Cm according to the static is capacity, the number of charging and discharging times or the service time of the battery may be counted.
  • the static factor Cm is reduced by a set value when a set threshold is reached, e.g. when it is counted that the number of charging and discharging times of the battery is increased by 500 times, the static factor Cm is reduced by a set value,
  • monitoring a temperature of the battery in real time and acquiring a corresponding dynamic factor according to the temperature of the battery specifically includes: monitoring the temperature of the battery in real time, and acquiring a current battery temperature; calculating a difference between a preset battery reference temperature and the current battery temperature, and multiplying the difference by a preset coefficient to obtain the dynamic factor.
  • the dynamic factor is a changing component of the charge current coefficient during a charge process and changes with the temperature of the battery during the charge process.
  • the value of the dynamic factor is regulated in real time according to a relation between the temperature of the battery and the dynamic factor, wherein the relation is counted and acquired.
  • the capacity of the battery is reduced when the temperature of the battery is relatively high, and the charge current needs to be reduced, i.e., the charge current is reduced through reducing the dynamic factor, while the capacity of the battery is increased when the temperature of the battery is relatively low, and it needs to increase the charge current, i.e., the charge current is increased through increasing the dynamic factor.
  • the acquired dynamic factor when the current battery temperature is equal to the preset reference temperature, the acquired dynamic factor is zero; when the current battery temperature is greater than the preset reference temperature, the acquired dynamic factor is a negative value; and when the current battery temperature is smaller than the preset reference temperature, the acquired dynamic factor is a positive value;
  • Step 302 calculate a maximum allowed charge current according to the dynamic factor and preset static factors, wherein the static factors are used for characterizing fixed components of the charge current coefficient during the charge process;
  • the calculating a maximum allowed charge current according to the dynamic factor and preset static factors specifically includes: calculate the sum of the dynamic factor and the preset static factors, and acquire the charge current coefficient according to the calculated result; calculate the product of the charge current coefficient and a battery nominal capacity, and use the calculated result as the maximum allowed charge current;
  • Step 3021 determine whether the calculated result is greater than or equal to a preset charge current coefficient minimum value, and smaller than or equal to a preset charge current coefficient maximum value; if yes.
  • Step 3022 use the calculated result as the charge current coefficient; otherwise.
  • Step 3023 when determining that the calculated result is smaller than the preset charge current coefficient minimum value, use the preset charge current coefficient minimum value as the charge current coefficient
  • Step 3024 when determining that the calculated result is greater than the preset charge current coefficient maximum value, use the preset charge current coefficient maximum value as the charge current coefficient;
  • Step 303 control the charge of the battery according to the maximum allowed charge current.
  • the controlling the charge of the battery refers to ensuring that the charge current is not greater than the maximum allowed charge current.
  • the charge process ends when the battery voltage reaches a preset target voltage value.
  • the power source uses a 200 AH battery as a backup power source and the service life of the battery is 5 years.
  • static factors Cr, Cg, Ck and Cm are respectively preset first based on the battery and a power supply system for the battery.
  • Cr is set to be 0.15 according to a charge coefficient provided by the battery manufacturer.
  • Cg is set to be ⁇ 0.01 in order to prevent the generator from being started frequently due to an excessive charge current during an early starting stage of the generator; a main power supply system fails frequently according to a historical statistics result, and Ck is set to be 0.05 according to a power failure frequency.
  • the service life of the battery is 5 years and Cm is set to be ⁇ 0.01. Subsequently, during the charge process of the battery, the temperature of the battery is sampled in real time, and increases continuously. A dynamic factor is set to be regulated once every 2 degrees centigrade by which the temperature of the battery changes.
  • the temperature of the battery is 15 degrees centigrade at moment t 20 , the dynamic factor is 0.01, and a charge current coefficient acquired is 0.19; the temperature of the battery is 21 degrees centigrade at moment t 21 , the dynamic factor is 0.004, and a corresponding charge current coefficient is 0.184; the temperature of the battery is 25 degrees centigrade at moment t 22 , the dynamic factor is 0, and a corresponding charge current coefficient is 0.18; the temperature of the battery is 30 degrees centigrade at moment t 23 , the dynamic factor is ⁇ 0.005, and a corresponding charge current coefficient is 0.175. Finally, a maximum allowed charge current of each moment is calculated and acquired, and the charge of the battery is controlled based on the maximum allowed charge current.
  • each static factor is preset based on the battery and a power supply system for the battery.
  • the temperature of the battery is monitored in real time, a dynamic factor is regulated in real time according to the temperature of the battery, a maximum allowed charge current is calculated based on each static factor and the dynamic factor, and the charge of the battery is controlled according to the maximum allowed charge current, thereby effectively avoiding the situation where the charge current of the battery is too high or too low due to constant current charge applied to various application scenarios.
  • This enables adaptive charge management according to application scenarios, improves the environmental adaptability of battery charging, and further extends the service life of the battery and saves costs.
  • a corresponding dynamic factor is acquired according to the temperature of a battery.
  • a maximum allowed charge current is calculated by combining the dynamic factor and each preset static factor so as to regulate the maximum allowed charge current dynamically according to environmental changes, and control the charge of the battery according to the maximum allowed charge current. Therefore, this enables adaptive charge management according to application scenarios, which effectively avoids the situation where the charge current of the battery is too high or too low, improves the environmental adaptability of battery charging, and further extends the service life of the battery and saves costs.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
US13/979,379 2011-01-14 2011-08-30 Method and device for controlling charge of battery Active 2032-03-11 US9225186B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201110008516 2011-01-14
CN2011100085167A CN102195105B (zh) 2011-01-14 2011-01-14 一种蓄电池充电控制方法及装置
CN20110008516.7 2011-01-14
PCT/CN2011/079110 WO2012094899A1 (fr) 2011-01-14 2011-08-30 Procédé et dispositif pour commander la charge d'une batterie

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US20130285619A1 US20130285619A1 (en) 2013-10-31
US9225186B2 true US9225186B2 (en) 2015-12-29

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US (1) US9225186B2 (fr)
EP (1) EP2654118B1 (fr)
CN (1) CN102195105B (fr)
ES (1) ES2671892T3 (fr)
PL (1) PL2654118T3 (fr)
TR (1) TR201808674T4 (fr)
WO (1) WO2012094899A1 (fr)

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CN106208213A (zh) * 2016-08-04 2016-12-07 广东欧珀移动通信有限公司 一种pid调节充电电流的方法及终端
CN106208210B (zh) * 2016-08-04 2018-03-02 广东欧珀移动通信有限公司 一种pid充电电流防抖调控方法及终端
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CN107862124B (zh) * 2017-11-02 2021-06-04 上海空间电源研究所 锂电池限压充电系统模型建立及计算方法
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CN109991547B (zh) * 2019-03-29 2021-06-18 深圳猛犸电动科技有限公司 锂离子电池包最大允许充放电电流估计方法及装置
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CN111934382B (zh) * 2020-08-11 2022-07-08 北京小米移动软件有限公司 一种充电方法、装置及存储介质
CN112383101A (zh) * 2020-10-28 2021-02-19 国网湖南省电力有限公司 用于地线取电的充电控制方法及系统
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PL2654118T3 (pl) 2018-08-31
CN102195105A (zh) 2011-09-21
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WO2012094899A1 (fr) 2012-07-19
TR201808674T4 (tr) 2018-07-23
ES2671892T3 (es) 2018-06-11

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